Appeal No. 95-1632
Application No. 07/991,658
The claims relate to a method of preparing an adherent
amorphous fluorinated copolymer coating upon the surface of a
substrate.
The patentability of each claim is not argued separately
and, thus, the claims are considered to stand or fall together.
Claim 5 is representative of the subject matter on appeal and
reads as follows:
5. The method of preparing an adherent and
coherent castable amorphous fluorinated copolymer
coating upon the surface of a substrate, the coating
consisting essentially of high molecular weight
fluoropolymers of ethylenic-cyclo oxyaliphatic
substituted ethylenic copolymer, and including the
steps of:
(a) depositing an adherent initial film of a
fluoropolymer having a thickness between about 1,500 AE
and 50,000 AE to the surface of said substrate by
vacuum deposition, said initial fluoropolymer coating
being selected from the group consisting of fluorinated
ethylenic-cyclo oxyaliphatic substituted ethylenic
copolymers and having the structural repeating unit:
- (CF - CF ) (-CF - CF) -2 2 n m
# #
O O
\ /
C
/ \
CF CF3 3
wherein “m” and “n” represent integers providing a
molecular weight of between about 230,000 and 500,000,
with the values of “m” and “n” providing a copolymer
with a glass transition temperature ranging from
between about 160E C. and 240E C.; and
2
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